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Metal Wire Reverse Torsion Tester

NJS-10X series Metal Wire Torsion Tester is used to execute metal wire torsion test, measure the metal wire endure of plastic distortion ability in single or double direction torsion condition; check the surface or internal defect. ISO 7800 Metallic materials -- Wire -- Simple torsion test; ISO 9649 Metallic materials -- Wire -- Reverse torsion test; ASTM A938 Standard Test Method for Torsion Testing of Wire; GB/T 239

Main Application:

Steel:  steel wire, steel rod, steel rebar;
Copper: copper wire, copper rod, copper alloy
Aluminum: Aluminum wire, aluminum rod, aluminum alloy;
Other metal: Rod, glass steel, alloy steel etc.

Principle:
A test piece of wire is twisted a specified number of turns through 360° around its own axis in one direction, and then a specified number of turns through 360° in the opposite direction.




Model NJS-1X NJS-3X NJS-10X NJS-30X
Metal wire diameter 0.3-1mm 1-3mm 3-10mm 10-30mm
Movable guide rail parallelism <0.2
Two clamper distance 300mm 500mm
Torsion speed 180, 300±10% rpm 60, 120±10% Rpm 30, 60±10% Rpm
Working noise <70dB
Jaw hardness 55~65
Power supply 50Hz, 380V
Frame,
Motor
LCD controller
Chuck
Power cord
Manual
ISO 7800 Metallic materials -- Wire -- Simple torsion test
ISO 9649 Metallic materials -- Wire -- Reverse torsion test. 
ASTM A938
Standard Test Method for Torsion Testing of Wire
GB/T 239.1,  GB/T 239.2 Metallic materials -- Wire – torsion test.

This Standard specifies a method for determining the ability of metallic wire of diameter dimension from 0,3 mm to 10,0 mm inclusive to undergo plastic deformation during reverse torsion. This test is used to detect surface defects, as well as to assess ductility.


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